Composites Based on Nanoparticle and Pan Electrospun Nanofiber Membranes for Air Filtration and Bacterial Removal

Autor(es)

Canalli Bortolassi, Ana Claudia ^[1] ; Guerra, Vadila Giovana ^[1] ; Aguiar, Monica Lopes ^[1] ; Soussan, Laurence ^[2] ; Cornu, David ^[2] ; Miele, Philippe ^[2] ; Bechelany, Mikhael ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos UFSCar, Dept Engn Quim, Rodovia Washington Luiz, Km 235 SP 310, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Montpellier, Inst Europeen Membranes, CNRS, ENSCM, UMR 5635, F-34070 Montpellier - France

• Tipo de documento: Artigo Científico
• Fonte: NANOMATERIALS; v. 9, n. 12 DEC 2019.
• Citações Web of Science: 0

Resumo

Often, solid matter is separated from particle-laden flow streams using electrospun filters due to their high specific surface area, good ability to capture aerial particulate matter, and low material costs. Moreover, electrospinning allows incorporating nanoparticles to improve the filter's air filtration efficiency and bacterial removal. Therefore, a new, improved polyacrylonitrile (PAN) nanofibers membrane that could be used to remove air pollutants and also with antibacterial activity was developed. We engineered three different filters that are characterized by the different particles embedded in the PAN nanofibers: titanium dioxide (TiO2), zinc oxide (ZnO), and silver (Ag). Then, their filtration performance was assessed by quantifying the filtration of sodium chloride (NaCl) aerosol particles of 9 to 300 nm in diameter using a scanning mobility particle sizer. The TiO2\_F filter displayed the smallest fiber diameter and the highest filtration efficiency (approximate to 100%). Conversely, the Ag\_F filter showed the highest quality factor (approximate to 0.06 Pa-1) because of the lower air pressure drop. The resulting Ag\_F nanofibers displayed a very good antibacterial activity using an Escherichia coli suspension (10(8) CFU/mL). Moreover, the quality factor of these membranes was higher than that of the commercially available nanofiber membrane for air filtration. (AU)

• Processo FAPESP: 16/20500-6 - Desenvolvimento e avaliação de meios filtrantes com nanofibras obtidos pelo processo de eletrofiação aplicados na filtração de gases
• Beneficiário: Mônica Lopes Aguiar
• Modalidade de apoio: Auxílio à Pesquisa - Regular